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4.3 Maintenance Intervals
Table 4-1 shows systems and items, installed by this STC, which must undergo tests or checks
at specific intervals. If the interval is shown to be in flight time as well as calendar months, the
first interval reached should be used as the limit.
Those inspections that are based on flight time or calendar elapsed time or cycles shall have
specific intervals stated in Table 4-1.
Item
Equipment electrical
Bonding Test
Equipment Bonding Visual
Inspection – suspected
lightning strike
GFC 500 Equipment
Visual Inspection
Disconnect Tone and
Sonalert Test
GSA 28 Servos
GMC 507 Autopilot Mode
Controller
Servos, Servo Control
Cables and associated
hardware
GFC 500 Autopilot with ESP Part 23 AML STC Maintenance Manual
190-02291-01
Table 4-1 – Maintenance Intervals
Description/Procedure
Verify bonding of GMC 507 rack (if
installed), GMC 507 (if installed without
rack), GSA 28 mounting brackets, and
any associated bonding components
Inspection of bonding Components
Visual inspection of GFC 500
components
Functional test of Audio output and/or
Sonalert
Removal and Replacement
Removal and Replacement
Visual Inspection
Manual
Interval
Section No.
Following removal
and replacement of
the racks or brackets
4.5
AND
Every 2000 flight
hours or ten years,
whichever is first
At any suspected or
Table 4-3
actual lightning
strike
At every annual
4.4
inspection
At every annual
4.6
inspection
6.2
On Condition
6.1
On Condition
With aircraft
manufacturer's
Table 4-2
required primary
control cable checks
Page 14
Revision 1
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